نتایج جستجو برای: میکروسکوپ afm

تعداد نتایج: 21441  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه لرستان - دانشکده علوم پایه 1390

در نخستین بخش از این کار تحقیقاتی، سه نوع نانومواد هیبریدی به عنوان نانوکاتالیست تهیه شد. ابتدا کوپلیمر خطی- دندریتیکی نوع aba ، که در آن قطعهb شامل پلی اتیلن گلایکول، و قطعه a شامل بخش پلی آمیدوآمین است (pamam-peg-pamam) را تانسل دوم سنتز کرده، سپس یک ترکیب که دارای حلقه های آروماتیک فراوان بود را به گروه های عاملی آمین انتهایی نسل دوم کوپلیمر خطی- دندریتیکی سنتز شده و وصل شد (g2-pt) . این گرو...

2007
Santiago D Solares

Since the 1980s, atomic force microscopy (AFM) has rapidly developed into a versatile, high-resolution characterization technique, available in a variety of imaging modes. Within intermittent-contact tapping-mode, imaging bistability and sample mechanical damage continue to be two of the most important challenges faced daily by AFM users. Recently, a new double-control-loop tapping-mode imaging...

2016
Xichao Zhang Yan Zhou Motohiko Ezawa

Magnetic skyrmions are particle-like topological excitations in ferromagnets, which have the topo-logical number Q = ± 1, and hence show the skyrmion Hall effect (SkHE) due to the Magnus force effect originating from the topology. Here, we propose the counterpart of the magnetic skyrmion in the antiferromagnetic (AFM) system, that is, the AFM skyrmion, which is topologically protected but witho...

2013
Daniel Kiracofe Arvind Raman Dalia Yablon

One of the key goals in atomic force microscopy (AFM) imaging is to enhance material property contrast with high resolution. Bimodal AFM, where two eigenmodes are simultaneously excited, confers significant advantages over conventional single-frequency tapping mode AFM due to its ability to provide contrast between regions with different material properties under gentle imaging conditions. Bimo...

Journal: :The Review of scientific instruments 2014
Jonathan D Adams Adrian Nievergelt Blake W Erickson Chen Yang Maja Dukic Georg E Fantner

We present an atomic force microscope (AFM) head for optical beam deflection on small cantilevers. Our AFM head is designed to be small in size, easily integrated into a commercial AFM system, and has a modular architecture facilitating exchange of the optical and electronic assemblies. We present two different designs for both the optical beam deflection and the electronic readout systems, and...

چکیده سابقه و هدف: امروزه نانوذرات و نانو الیاف سلولزی (CNF) جایگاه گسترده‌ای در صنایع غذایی بویژه صنعت بسته‌بندی پیدا کرده‌اند. حضور این مواد در ساختار ماده بسته‌بندی می‌تواند نقش مفیدی در بهبود ویژگی‌های مکانیکی، بازدارندگی و حرارتی ماده بسته‌بندی ایفـاء کنـد. نانو الیاف سلولزی به دلیل دسترس‌‌‌پذیری بالا، قیمت مناسب، تجدیدپذیری، سطح ویژه زیاد و ویژگی‌‌های مکانیکی مناسب به عنوان تقویت‌کننده در...

Journal: :Hyomen Kagaku 2001

2016
Xin Wu Mariappan Muthuchamy Doodipala Samba Reddy

Physiological interactions between extracellular matrix (ECM) proteins and membrane integrin receptors play a crucial role in neuroplasticity in the hippocampus, a key region involved in epilepsy. The atomic force microscopy (AFM) is a cutting-edge technique to study structural and functional measurements at nanometer resolution between the AFM probe and cell surface under liquid. AFM has been ...

2010
Nathalie Paniel Antonio Radoi Jean-Louis Marty

We have developed an electrochemical immunosensor for the detection of ultratrace amounts of aflatoxin M(1) (AFM(1)) in food products. The sensor was based on a competitive immunoassay using horseradish peroxidase (HRP) as a tag. Magnetic nanoparticles coated with antibody (anti-AFM(1)) were used to separate the bound and unbound fractions. The samples containing AFM(1) were incubated with a fi...

2002
H.-Y. Nie M. J. Walzak N. S. McIntyre

Atomic force microscopy (AFM) uses a very sharply pointed mechanical probe to collect real-space morphological information of solid surfaces. AFM was used to image the surface morphology of a biaxially-oriented polypropylene film. The polymer film is characterized by a nanometer-scale fiber-like network structure, which reflects the drawing process used during the fabrication of the film. Polym...

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